Seeing as that is only a prototype, the design could change radically between now and when the show is in progress. If you had seen the original test footage for "The Batman" (the series just before Brave and the Bold). you would have seen the designs were way different than what they ended up with, they actually had less stylized designs than the show eventually did, and looked more like designs from the actual comics.
This design we see here may or may not end up as the final version, we'll have to wait and see.